Automatic update from web-platform-tests
fonts: Simplify logic around `@font-face` descriptors
This changes `CSSFontFaceDescriptors` to use:
- `ComputedFontWeightRange` instead of a pair of `FontWeight`
- `ComputedFontStretchRange` instead of a pair of `FontStretch`
- Stylo's `ComputedFontStyleDescriptor` instead of a similar copy of that
This way we can simply use the `compute()` method of `FontWeightRange`,
`FontStretchRange` and `FontFaceStyle` to compute the above.
Signed-off-by: Oriol Brufau <obrufau@igalia.com>
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wpt-commits: 55ad1f1d6b4856e29c5fd6418292519a4c23fd1f
wpt-pr: 60805